Our customers have the option of paying via multiple options - Paypal, Venmo, Google Pay, Apple Pay, Shopify pay, Credit or Debit card. Venmo doesn't appear as a separate option but is available through Paypal.
Since Venmo was acquired by Paypal, purchasing online with Venmo is available on mobile devices through apps or mobile web browsers. In order to use this feature, you will need to opt-in (this requires a couple of steps on the app and needs to be enabled) on the Venmo app. After you have opted-in, simply tap the PayPal button on a mobile web browser to launch the PayPal checkout experience and the Venmo payment option should appear on the next page.
See additional information from Venmo regarding purchasing online